Engine Water Temperature Gauge (Coolant Temperature Gauge) Indicates Abnormally; A) After Engine Is Started, Temperature Does Not Rise At All From Lowest Level - Komatsu PC58UU-3 Shop Manual

TROUBLESHOOTING
M-9 Engine water temperature gauge (Coolant temperature gauge)
indicates abnormally

a) After engine is started, temperature does not rise at all from lowest level

• Turn starting switch ON.
• Connect short connector to
M10.
• See Note 1).
• Turn starting switch ON.
• Short F27 (6) to (3) and (4).
• See Note 1).
Note 1) If normal, gauge rises 1
level by 1 at intervals of about 2
seconds.
20-608-2
(6)
Does gauge rise 1 level by 1 and go off
at last?
YES
Does gauge rise 1 level by 1 and go off
at last?
YES
Cause
1
NO
Defective coolant tempera-
ture sensor
Disconnection or defective
2
contact in wiring harness
between F27 (female) (6) –
NO
M10 (female) (1) or between
M10 (female) (2) – chassis
ground
Defective monitor panel
M-9
Remedy
Replace
Repair or
replace wiring
harness
Replace
PC58UU-3